Connecting 2 WIFI Extenders

The EX2700 doesn't support a direct connection to a router. It doesn't have an access point mode.

I'd start by factory resetting the ex2700. Push and hold reset for 7-15 seconds while its powered on. 

Then use the installation assistant to try setting it up. 

I'd advise against daisy chaining single/dual band extenders like the ex2700/3700. Extenders by their very nature decrease throughput (speed) 50% of what they receive from the router. This happens because they have to go router---extender and then extender----device. And the same chip has to do both but can't do them at the same time. So it cuts speeds in half.  And distance/obstruction/interference reduces that speeds. So if you've got 1 extenders, you're running at best 50% of what the router is putting out. Plus you've got increased latency. Add a 2nd extender in the line (daisy chain) and you're at best speed is 25% of what the router is connecting with. But it never connects at full speeds because of the distance/obstruction/interference issue. And again, increased latency because of another hop. 

So try not to daisy chain. Try for a star configuration if you have to use more than 1 extender.

Examples:

Daisy chain:  router----->extender------>extender

Star: Extender<--------router------->extender

If you have to daisy chain and you need more than 1 extender, I'd recommend moving to a triband mesh system. They have a dedicated backhaul to prevent the speed/latency issue that standard single/dual band extenders suffer from.